Properties of the Number 55921

Fifty-Five Thousand Nine Hundred Twenty-One

Basics

Value: 55920 → 55921 → 55922

Parity: odd

Prime: Yes

Previous Prime: 55903

Next Prime: 55927

Digit Sum: 22

Digital Root: 4

Palindrome: No

Factorization: 55921

Divisors: 1, 55921

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

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Representations

Binary: 1101101001110001

Octal: 155161

Duodecimal: 28441

Hexadecimal: da71

Square: 3127158241

Square Root: 236.47621444872632

Classification

Fibonacci: No

Bell Number: No

Factorial Number: No

Regular Number: No

Perfect Number: No

Special

Kaprekar Constant: No

Munchausen Constant: No

Armstrong Number: No

Kaprekar Number: No

Catalan Number: No

Vampire Number: No

Taxicab Number: No

Super Prime: No

Friedman Number: No

Fermat Number: No

Cullen Number: No

OEIS Sequences

Numbers n such that n, 10·n+1, 10·n+3, 10·n+7 and 10·n+9 are all primes. A67267

Primes p such that 2·prime(p) + 1 = prime(q) for some prime q. A261361

Numbers Sum_j=1..k σ(j) / σ(k) when this expression is an integer. A168128

Primes for which the smallest positive primitive root is odd and nonprime. A70269

Primes of the form pq + p + 1 where p < q are adjacent primes. A180932

Primes of form a²+b² such that a⁴+b⁴ and a⁸+b⁸ are primes. A182313

Primes p such that p+12, (p+1)/2, and (p+13)/2 are also prime. A283869

Primes with 21 as smallest positive primitive root. A61333

Prime partial sums of safe primes A005385. A172036

Numbers k such that the continued fraction for sqrt(k) has odd period and if the last term of the periodic part is deleted the two central terms are both 31. A31619